Those numbers would appear to hold true despite an end-of-year rally in Q4. Bloomberg New Energy Finance reports that clean energy investment fell 11 percent over the course of the year compared to 2011, with the sector being hampered by policy uncertainty in Europe and the U.S., as well as competition from cheap natural gas and the tricky predicament of rapidly falling technology prices. It wasn't all bad news, however, with emerging markets making up for much of the shortfall in the West. This from Bloomberg:

...[S]trong growth in China, South Africa and Japan, which benefitted from the launch of the country's post-Fukushima renewable energy subsidy scheme, was unable to fully offset a drop in U.S. investment of almost a third caused by policy uncertainty and increased competition from relatively low cost gas, as well as falls in investment for Spain and Italy of 68 percent and 51 percent respectively.

Given the extreme weather we've witnessed on both sides of the New Year, the investment world would do well to heed its own warnings on climate change and consider a broader concept of ROI when it comes to ensuring a stable future for our economy and our planet.